Poking around on the Forum, I found this thread, that goes with these two pictures of Octie Ham’s car:
Before it went up for sale, from the Showcase
When it was for sale
And this thread, which goes with this picture:
So that clears things up a bit - I’ll have to find a better picture of the plumbing at the thermostat and water pump. But here’s my best guess:
left heater thermostat port - left heater core port
right heater thermostat port - left water pump port
right heater core port - rear manifold thermostat port
right water pump port - front manifold thermostat port
What do you say, Matthew?